Houston, TX · 18+ years
Sell Diamonds in Houston, TX
Gold King buys loose and mounted diamonds in Houston, grading each stone in front of you before making a cash offer.
Diamond value depends on carat weight, cut, color and clarity. We grade your stone under a loupe and scope, weigh it, factor in any GIA or AGS report you have, and quote a cash price for the diamond plus the metal it is set in.
Call 713-997-0875- Payment
- Cash, same visit
- Appraisal
- Free, no obligation
- Hours
- Mon–Thu 9:30AM–7PM, Fri–Sat 9:30AM–8PM, Sun 12–7PM
What Gold King buys
Diamond items
- Engagement rings and wedding sets
- Loose diamonds, 0.30 ct and larger
- Tennis bracelets and diamond tennis necklaces
- Diamond studs, halos and cluster pieces
Also considered
- Certified stones with GIA, AGS or IGI reports
- Old European, old mine and rose cuts
- Fancy shapes — oval, emerald, pear, marquise, cushion
- Estate and inherited diamond jewelry
GIA and certified diamonds
If your diamond came with a GIA, AGS or IGI report, bring it. A grading report from a respected lab removes the disagreement over color and clarity that otherwise sits at the center of every diamond negotiation, and it lets the stone be priced directly against current market data for that exact grade combination.
GIA reports carry the most weight in the trade. Reports from labs known to grade loosely still help by confirming measurements and identifying whether a stone is natural or lab-grown, but the grades on them are re-checked in-house rather than taken at face value.
No report is not a problem. We grade the stone under a loupe and scope with you present, explain the color, clarity, cut and measurements we arrived at, and quote from there. Certification is never required to sell.
What actually moves a diamond offer
Carat weight is the loudest factor but not the only one — the market steps up sharply at half-carat and full-carat boundaries, so a 0.98 ct and a 1.02 ct can differ more than the weight suggests. Cut quality drives brightness and is where poorly proportioned stones lose value quietly.
Fluorescence, chips on the girdle, and treatments such as fracture filling or laser drilling all affect resale and are checked and disclosed. Lab-grown diamonds are identified with testing and priced honestly against a market that sits far below natural stones.
Also useful: selling a full estate with diamonds.
Selling a diamond ring in Houston
Engagement rings are the most common diamond sale we handle, and they are valued as two numbers added together: the center stone plus any accent diamonds, and the gold or platinum mounting by weight. You see both figures rather than one blended total.
Bring the ring, any grading report or appraisal you have, and a valid photo ID to 6809 Southwest Freeway, Houston, TX 77074, open Monday–Thursday 9:30 AM–7:00 PM, Friday–Saturday 9:30 AM–8:00 PM and Sunday 12:00–7:00 PM. Insurance appraisals state replacement cost, not resale value, so expect the two numbers to differ — we will explain why.
Also useful: sell other fine jewelry the same visit.
Ready for a free evaluation? Call 713-997-0875 or visit 6809 Southwest Freeway, Houston, TX 77074.
How we price it
- The diamond and the mounting are valued separately and added together.
- Grading reports speed the process but are not required.
- Lab-grown diamonds are identified honestly and priced accordingly.
| What you bring | How the payout is calculated | Time in store |
|---|---|---|
| Diamond items | The diamond and the mounting are valued separately and added together. | 10–20 min |
| Also considered | Grading reports speed the process but are not required. | 10–20 min |
The buying process
- 1
Bring it in
Walk in during store hours or call for an after-hours appointment.
- 2
We test and weigh
Electronic testing, acid confirmation and a legal-for-trade scale, in front of you.
- 3
You get an offer
A firm cash number based on live spot pricing and current market data.
- 4
Paid on the spot
Accept and leave with cash, or decline and take your items home.
Selling more than one kind of item? Many customers who come to us for sell diamonds also bring in estate jewelry, jewelry buyer and gold on the same visit — everything is appraised together and paid out in one cash offer. You can also see what Houston sellers bring us or get directions to our Southwest Freeway store.
Sell Diamonds — Questions & Answers
- Who buys diamonds in Houston?
- Gold King at 6809 Southwest Freeway buys loose and mounted diamonds in Houston, grades stones in front of the seller, and pays cash the same day. Call 713-997-0875.
- Do I need a GIA certificate to sell a diamond?
- No. A GIA or AGS report helps confirm grading and can support a higher offer, but Gold King grades stones in-house at no charge.
- Do you buy lab-grown diamonds?
- We test every stone and will tell you if it is lab-grown or moissanite. Lab-grown diamonds have a much lower resale value than natural stones, and we quote accordingly.
- Where can I sell a diamond in Houston?
- Gold King buys loose and mounted diamonds at 6809 Southwest Freeway, Houston, TX 77074, grading each stone in front of the seller and paying cash the same visit. Call 713-997-0875.
- Does a GIA certificate increase what I get for my diamond?
- It can. A GIA report confirms grading independently, which removes uncertainty and supports pricing directly against market data for that grade. Stones without reports are graded in-house at no charge.
- Why is my offer lower than my insurance appraisal?
- Insurance appraisals state retail replacement cost, which includes markup, setting labor and tax. A resale offer reflects what the stone and metal are worth in the current secondary market.
Guides to read first
Before you sell, it helps to know how the offer is calculated. These Gold King guides cover it in plain language:
- Pricing18K Gold Value Guide: Worth, Stamps & Selling18K gold value explained: purity math, designer and European jewelry, hallmark stamps, and what changes when you sell a branded piece.
- PlatinumPlatinum Value Guide: Purity, Worth & SellingHow platinum jewelry is valued: purity stamps, why it's priced differently than gold, and what to expect selling platinum in Houston.
- DiamondsHow to Sell a Diamond: 4Cs, Reports & PricingUnderstand the 4Cs, GIA vs. other reports, lab-grown vs. natural, and how diamond resale pricing really works before you sell.
- JewelryEstate Jewelry Guide: Settling & Selling a CollectionA practical guide to sorting a full jewelry box, handling executor paperwork, and selling estate jewelry for its real value.
- JewelryJewelry Appraisal Guide: Insurance vs. ResaleWhy an insurance appraisal and a resale offer on the same piece of jewelry can be very different numbers, and what each is for.
- JewelryEngagement Ring Resale: What They're Really WorthWhat an engagement ring is realistically worth on resale after a broken engagement, divorce or upgrade, and how to get the most for it.
- DiamondsHow Diamonds Are Evaluated Before SaleLearn how buyers assess diamonds using the 4Cs, certification, fluorescence and cut quality — plus how lab-grown stones are identified.
- EducationWhat to Bring to Sell Gold: ID, Papers & ChecklistYes, you need a photo ID. Here is the full checklist of what to bring when you sell gold, jewelry, coins or watches — and what you can leave at home.
- EducationSelling Gold in Houston: FAQ HubAnswers to the most common questions about selling gold, jewelry, coins and watches for cash in Houston, all in one place.